Casing for electric motors.



No. 669,577. Patented Mar. l2, l90l. C. A. ECK.

CASING FOR ELECTRIC MOTORS.

(Application filed Oct. 30. 1900.)

(No Model.)

INVENTOR .X WC

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UNITED STATES PATENT OFFIQE.

CHARLES A. EOK, OF NEWARK, NEIV JERSEY.

CASING FOR ELECTRlC MQTGRS'.

SPECIFICATION forming part of Letters Patent No. 669,577, dated March12, 1901.

Application filed October 80, 1900. Serial No. 34,920. (No model.)

To all whom, it may concern:

Be it known that I, CHARLES A. ECK, a subject of the King of Sweden andNorway, and a resident of Newark, in the county of Essex and State ofNew Jersey, have invented certain new and useful Improvements in Casingsfor Electric Motors, of which the following is a specification.

My invention relates generally to electric motors, and more particularlyto the casings of same; and the object of the invention is toprovideaconvenientandinexpensive cover or closure for covering up thedelicate parts of the motor when the latter is operated in a place whereit is exposed to dust, such as in a factory or when it is used tooperate a motor-vehicle, and which at the same time can be opened togive easy access to such parts as need inspection regularly-as, forinstance, the brushes.

Other objects will appear farther on in the specification.

To these ends the invention consists of the hereinafter-describedcombination of cooperative elements.

In the drawings I have embodied the invention in what I consider thebest means; but changes may of course be made within the scope of theclaims.

In the said drawings, Figure 1 is an end view of a motor embodying myinvention. Fig. 2 is a transverse section on line o; :t of 1, showingone end open and the other closed. Fig. 3 is a modification.

Similar numerals of reference indicate corresponding parts in thedifferent views.

I shall. describe the casing of an electric motor embodying my inventionand afterward point out the novel features in the claims.

1 indicates the casing of a motor of any suitable construction,formedwith the pole-pieces 2 and with the open ends 3 and a. To these openends are fastened the end pieces 5 and 6, termiuatingin the bearingportions or bushings 7, adapted to support the armature-shaft 8. Theseend pieces are stationary and rigid with the casing of the motor and areprovided with one or more apertures 7"", in this instance radiallydisposed. The end piece 5 is made straight, while the end piece 6 ismade slanting, as shown, to accommodate the armature and the brushes;but other shapes, such as a rounded or semicircular shape, might beused, if desired.

8 and 8 indicate two movable closing members adapted to rotate or slideon the outside of the bushing 7, where they are mounted loosely and heldup tight against the end pieces by means of the springs 9 in the holes10 of the detachable cap 11. The movable closing member 8 is made of asurface contour similar to the surface contour of the end piece 5, whilethe movable closing member 8 is made of a surface contour to correspondwith the surface contour of the end piece (5; but both are provided withone or more apertures 12, corresponding in size to the aper- 'tu res 7of the end pieces. The movable closing members are further provided withone or more knobs 13, adapted to be grasped by the hand when the membersare to be manipulated, and with a lug 14:, adapted to limit the movementof the movable members by its contact with the stop 15.

From the above it will be understood that when access is desired to thebrushes, for instance, or when the motor is kept in a place where it mayremain open during the period it operates the movable members arerotated until the apertures 12 register with the apertures 7 of the endpieces, whereby the interior parts are exposed. Conversely, when it isdesired to close the motor up the movable members are rotated until theapertures 12 and 7 are brought out of alinement with each other. In thisinstance the movement of the movable member is shown as being concentricwith the stationary member; but itis obvious that in its place may beemployed one or more eccentric movements to close the openings of thestationary member so long as the surface contour of the movable closingmember conforms to and contacts with the stationary member and themovement of such closing member is parallel to such contour. It will ofcourse also be understood that the movable closing member could beapplied to other openings in other parts of the casing with equaleffect.

In Fig. 3 is shown a modification consisting in providing one of the twomembers with the slits 1G to permit a draft of air through the interiorof the motor to cool the Same.

Having thus described myinvention, what I claim is 1. In an electricmotor, the combination With a stationary member of the casing, ofmovable closing member having a surface contour corresponding with thesurface contour of the said stationary member and having a movementparallel with such contour, one or more apertures in the stationarymember and a corresponding number of apertures in the movable memberadapted to be brought in and out of alinement With the apertures in thestationary member by the movement of the movable member, substantiallyas described.

2. In an electric motor, the combination with the casing of same of adetachable but stationary end piece provided with one or more aperturesand terminating in abushing or bearing, and a movable closing memberadapted to rotate on the bushing of the end piece and provided with acorresponding number of apertures adapted to be brought in and out ofalinement with the apertures on the stationary member by the movement ofthe movable member, substantially as described.

3. In an electric motor, the combination with the casing of same of adetachable but stationary end piece provided with one or more aperturesand terminating in a bushing or bearing, a movable closing memberadapted to rotate on the bushing of the end piece and provided with acorresponding number of apertures adapted to be brought in and out ofalinement with the apertures on "the stationary member by the movementof the movable member, a lug carried by said movable member, a stop onthe casing of the motor adapted to coact with the said lug to limit themovement of the movable member, and one or more springs adapted to pressthe movable member up against the stationary member, substantially asdescribed.

4-. In an electric motor, the combination with the casing of same of adetachable but stationary end piece provided with one or more aperl uresand terminating in abushing or hearing, a movable closing member adaptedto rotate on the bushing of the end piece and provided with acorresponding number of apertures adapted to be brought in and out ofalinement With the apertures on the stationary member by the movement ofthe movable member, a detachable cap on the bushing ot' the end pieceand a plurality of springs located in said bushing and adapted to holdthe movable member under twessure up against the stationary member,substantially as described.

5. In an electric motor, the combination with the casing of same of adetachable but stationary end piece provided with one or more aperturesand terminating in a bushing or hearing, a movable closing memberadapted to rotate on the bushing of the end piece and provided with acorrespondint, number of apertures adapted to be brought in and out ofalinement With the apertures on the stationary member by the movement ofthe movable member, and a plurality of slits formed in one of saidmembers adapted to admit air to the interior of the motor when theapertures on the movable and stationary members are out of alinemcntwith each other, substantially as described.

Signed at Newark, in the county of Essex and State of New Jersey, this22d day of Ocber, A. D. 1900.

CHA RLES A. ECK.

Witnesses:

FREDERICK 'l. R. GRUETT, AXEL V. ZEEKEN.

